@goc3, for cases with multiple inputs, you might wanna sort the answers for each case.
@Dyuman Joshi: each answer is invariant with respect to input order.
I don't remember why I wrote it here but this comment doesn't belong to this question. My Apologies.
Which values occur exactly three times?
Multiply 2 numbers
03 - Matrix Variables 3
Create a two dimensional zero matrix
Square the input
Scrabble Scores - 13
Pattern Recognition 1 - Known Unit Length
Lights Out 14 - 5x5, four stages, x moves
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